Molding appliance.



L. R. LEMOINE.

MOLDING APPLIANCE.

APPLICATION 'FILED ocr. 20. 19:7.

1,302,816. Patented May6, 1919.

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MOLDING ,APPL I'AN APPLICATION FILED OCT- 2 I 1,3O2,816, Patented May (5, 1919.

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LoUIs 1e. LEMOINE, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 UNITED STATES CAST IRON PIPE & FOUNDRY COMPANY, 0P BURLINGTON, NEW JERSEY, A CORPORA- TION or NEW JERSEY.

MOLDING APPLIANCE.

Specification of Letters Patent.

Patented 6, 1919.

Application filed October 20, 1917. Serial No. 197,552.

To all whom it may concern:

Be it known that I, Louis B. LEMOINE, a citizen of the United States, and a resident of the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Molding Appliances, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My present invention relates to patterns of the kind used in formingpipe molds which are rotated to define the mold cavity and to compact the mold forming sand be tween the pattern and the mold containing flask, and the object of my invention is to provide such a pattern with novel and effective means for forming the enlarged upper portion of the mold.

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed hereto and forming a part of this specifi cation. For a betterunderstanding of the invention, however, and the advantages possessed by it, reference should be had to the accompanying drawings and descriptive matter in which I have illustrated and described preferred embodiments of my invention.

Of the drawings:

Figure 1 is a sectional elevation of a pipe mold flask with my improved pattern mounted therein in condition for operation.

Fig. 2 is a section through the pattern taken on the line 2- 2 of Fig. 1.

Fig. 3 is a section through the pattern taken on the line 33. of Fig. 1.

Fig. A is a sectional elevation of the upper portion of a pipe mold with a modified form of pattern mounted therein.

Fig. 5 is a section through the pattern taken on the line 5--5 of Fig. 4, and

Fig. 6 is a section through the pattern taken on the line 6-6 of Fig. 4.

In the drawings, and referring first to the construction shown in Figs. 1, 2 and 3, A represents a tubular ramming pattern body of known type having ramming ribs or cams B parallel'to the axis of the pattern secured to the pattern body by means of screws H. The pattern ismounted in a flask C of conventional type. The lower end of the body pattern A is centered and rotatively supported by the usual ramming seat member secured to the lower end of the flask and shown as supporting the usual instrumentalities employed forming the socket or bell end of the mold. The bars or cams B are each shown as formed to fit against oppositely tapered seats A formed on the outer side of the pattern body. The forward edge of each cam bar B, having reference to the directionof rotation. of the pattern, fits against a radial shoulder A at the forward edge of the corresponding seat A. The convex outer surface of each cam bar B is preferably substantially flush with the adjacent. outer surface of the cam body A adjacent the shoulder A and pro gressively slopes away from the center of the pattern body from the front to the rear edge of the cam bar. In. so faras above described the pattern construction illustrated is of well known type and possessing no features novel with me.

The upper end of the flask C is outwardly flared or tapered to provide for the riser and runner basin portion of a pipe mold of the character illustrated, and my present invention has to do with the construction of the portion of the pattern employed to form the inner wall of this portion of the mold. For this purpose Istop the cam bars B at about the level of the upper end of the unflared cylindrical body portion of the mold cavity but continue the oppositely-tapered seats A and the shoulder A to a levelfabove that of theupper end of the flask, and Iseoure against each seat A above the corresponding cam bar B, a special set of cam bars E, which are ofsuitable contour, so that when the pattern is re volved a basin or riser portionof the mold cavity of desired shape will be formed. As shown, this portion of the interior mold surface comprlses superimposed conical. sections F, F", F of different taper and an upper cylindrical portion F The outer rear edges E of the pattern cams E are of such form as to coincide with elements of the surfaces F, F F and F and the convex outer surfaces of each cam bar E is shaped to run smoothly back to the outer edge of the corresponding shoulder A and there merge into the adjacent convex surface of the pattern body.

With the construction described, after the pattern is mounted in place in the flask, and the space between the pattern and the flask basin portion of the mold do not interfere with the necessary downward feed of the sand, between them, while at the same time they serve to properly compact and shape the riser and basin portion of the mold. The

cams E form simple and eflective means for forming the basin or riser portion of the mold which heretofore has been a relatively troublesome and expensive operation usually carried out by means of special and more or less troublesome and unsatisfactory expedients.

In Figs. A, 5 and 6 I have illustrated the use of my invention in connection with a rotating pattern comprising a cylindrical pattern body AA and a tubular sleeve mounted on and secured to the pattern body and formed with integral mold compacting and forming ribs B With this type of pattern I preferably form the ,riser and basin portion of the mold by means ofa tubular cam sleeve EE which is journaled on the pattern body AA above the cam sleeve BB, and is formed with cam ribs E f. The outer surface of the cam sleeve EE is substantially the same as the outersurfaces of the cam bars E, and corresponding portions of the pattern body A of Figs. 1, 2 and 3. As shown in Figs. 4,5 and 6 provisions are made for detachably connecting the cam sleeve EE to the pattern body AA, so that the two may be rotated together in forming the upper portion of the mold cavity, or the pattern body AA may be rotatedwithoutrotating the cam sleeve EE when thisis desirable the initial stages of the mold forming operation. The provisions made for this purpose comprise a collar A secured to the upper end of the pattern body AA and abutting against the upper end of the cam sleeve'EE. Slidingly mounted in the sleeve A is a bolt I which may be moved by means-of a projec tion I either, into the position shown in which it extends into a socket formed in the upper end of the cam sleeve EE and thus connects the cam sleeve EE to the pattern body, or into an upper position in which the pattern body AA is free to rotate without rotating the sleeve EE. This construction permits the cylindrical body portion of the mold being formed without any compacting of the sand in, and consequent interference of the feed of the latter through the portion of the flask above the cam sleeve BB.

While in accordance with the provisions of the statutes I have illustrated and described the best forms of my invention now known to me, it will be apparent to those skilled in the art that changes may be made in the form of the apparatus disclosed without departing from the spirit of my invention, and that some features of my invention may sometimes be used to advantage without a corresponding use of other features of the invention.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. A rotatable and longitudinally withdrawable pattern for use in forming a vertical pipe mold comprising in combination a pattern body, longitudinally extending cam ribs carried thereby for forming the body portion of the mold, and longitudinally extending cam ribs movable longitudinally with the pattern body mounted on said patternbody above the first mentioned ribs and shaped to form an upper portion of the mold of internal diameter larger at its upper end than at its lower end.

2. A longitudinally withdrawable pattern for use in forming a vertical pipe mold comprising in combination a rotatable pattern body, longitudinally extending cam ribs se, cured to said body for forming the body portion of the mold, a sleeve secured to. the upper end of the pattern body so as to move longitudinally with it whilefree to revolve upon it, cam ribs attached to said sleeve and shaped to form an upper mold portion increasing in internal diameter, and means for locking the sleeve to the pattern body so that it will rotate with it when desired.

LOUIS B. LEMOINE.

Copies "01' this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

" Washington, 11-0." 

